ok guys,i am building the panther and i am building the tension stays,,,on step 3 that i am suppose to put a locknut on the bottom nad the top of the long screw...part MD1...will not slide out...well how can i put the locknut all the way to the bottom ?i am confused....the locknut is part MA4.....my question is why is the long screw sliding out the bottom of the hull?what am i doing wrong?